Metallic packing



(No Model.)

A. D. KILBORN 8v 0. YOUNG. METALLIC PACKING.

No. 466,170. Patented Dec. 29, 1891.

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WITNESSES: .c' 2

UNITED STATES FFICE.

ATENT ALDEN D. KILBORN, OF OAKLAND, AND CHARLES YOUNG, OF SACRAMENTO,

CALIFORNIA.

METALLIC PACKING.

SPECIFICATION forming part of Letters Patent No. 466,170, dated December29, 1891.

Application filed September 11, 1891. Serial No. 405,417. (No model.)

To all whom it may concern.-

Be it known that we, ALDEN D. KILBORN, of Oakland, in the county ofAlameda, and CHARLES YOUNG, of Sacramento, and State of California, haveinvented certain new and useful Improvements in Metallic Packing; and wedo hereby declare that the following is a full, clear, and exactdescription of the invention,which will enable others skilled in the artto which it appertains to make and use the same, reference being had tothe accompanying drawings, and to the letters of reference markedthereon, which form part of this specification.

This invention relates to certain improvements in metallic packing forpiston-rods or,

valve-stems.

The object of the invention is to provide improved metallic packingsimple and inexpensive in construction and which will securely pack thepiston-rod or valve-stem with a minimum amount of friction and which isso constructed that it will not wedge on the rod or stem, and will allowfor lateral vibrations or play thereof.

A further object is to provide an improved metallic packing havinganimproved gland or box so constructed and provided with means that themetallic packing contained therein will be kept lubricated.

These objects are accomplished by and my invention. consists in certainnovel features of construction and in combinations of parts more fullydescribed hereinafter, and particularly pointed out in the claims.

Referring to the accompanying drawings, Figure 1 is a longitudinalcentral section of the box and packing, showing the piston-rod extendingtherethrough. Fig. 2 is a detail View showing the cap of the box and thelubricating-collar which fits in a recess or pocket in said cap.

In the drawings, reference-letter a indicates the gland or box,preferably formed integral and cylindrical, as shown, and at its innerend having the aperture through which the piston-rod or valve-stem bpasses. Near its outer end this box is provided with the exterior lugsor flanges 0, preferably perforated so that the box can be rigidlysecured in position to the cylinder-head.

The outer end of the box is preferably exteriorly threaded to receivethe cap d, which also has a central perforation for the pistonrod. Thiscap, if desired, can be exteriorly milled or otherwise formed, so thatit can be screwed up or unscrewed. The inner side of the cap around theopening e, through which the piston-rod passes, is annularly recessed toform a round chamber or space 6 around the said rod, and in this space alubricating-collar g is snugly fitted, snugly embracing the piston-rod.This collar preferably consists of a metal ring wound with cotton orother suit able absorbent material, which will retain a liquid lubricantand distribute the same upon the piston-rod, which it tightly embraces.The oil or lubricant duct 77. extends upwardly from said pocket in whichsaid ring is located to the exterior of the cap, so that oil can be fedthrough said duct h and the lubricatingcollar can be kept thoroughlysaturated with the lubricating compound. The lubricating ring is kept inposition in its pocket by me tallic packing and spring in the box.

A coiled expansive spring his in the inner portion of the box, at oneend bearing against the inner end of the box and at its opposite endbearing against flat inner face of the thick hard-metal washer 2',loosely embracing the piston-rod end, preferably composed or brass orother suitable metal. An internal shoulder j limits the inner movementof this washer. The outer face of this washer is provided with therearwardly-tapered or coneshaped recess, shown concentric with therod 1) and receiving the correspondingly-shaped cone end of the soft oranti-friction metal packing-ringn, split radially, so that it will bedrawn together to tightly clasp the rod when the washer is forced up onthe cone end. The opposite end of this packing-ring is formed fiat, andthe periphery of the ring is also flat and extends beyond or is flushwith the peripheral surface of said washer t'. The fiat end of thecone-shaped radia1ly=split small packing-ring m bears against the outerflat end of the large packing-ring and is located in a cone-shapedrecess in the large hardmetal washer 0, corresponding to the washer '5.The thick packing-ring n separates the two hard-metal washers 'i and o,and when this packing-ring, is worn by continued use, so that the twohard-metal washers come together, the packing-ring is removed andreplaced by a perfect ring. A ball or loose joint is formed between theouter end or cap of the box and the packing to permitlateral vibrationsof the rod by means of the thin hard-metal washer 12, having a flatouter side bearing against the cap and at its inner side, around andconcentric with the piston-rod, having an annular raised convex boss 1)titting in a concaved annular recess or depression Z, concentric withthe piston-rod and in the outer face of the hard-metal washer 0, asclearly shown. The washer p bears against the inner face of the cap orbox and retains the lubricating-collar in its pocket. The two beveledpacking-rings, having their flat ends bearing against flat surfaces andthe washers having flat ends, prevent these rings and washers twistingtransversely and wedging on the piston rod and causing friction andwear. The packing-ring 'n is formed thick, as shown, to allow for theend wear thereon of the two hard-metal washers between which it isinterposed. The small cone-shaped packing-ring is placed at the outerend or beyond the large packing-ring, so that there will be no chancefor steam to escape through. The ball-joint allows lateral vibrations ofthe piston without causing excessive wear or wedging.

The lubricating device atone end of the box keeps the metallic packingthoroughly lubricated. The spring keeps the parts yieldingly togetherand in position and prevents rattling.

It is obvious that the pressure of the steam on the inner washer,together with the pressure of the spring and the relative shapes of thewashers and packing-rings causes the packing-rings to tightly embracethe pistonrod or valve-stem, thereby forming a steamtight joint, whilethe shoulder in the box on which the inner washer rests, together withthe lubricating-ring embracing the pistonrod, prevents steam escapingaround the peripheries of the metallic packing-rings and washers.

Having thus fully described our invention, what we claim is- 1. Incombination,tl1e box through which the piston-rod passes, at its outerend having the pocket or annular recess around the piston-rod providedwith an oil-duct to the exterior of the box, the lubricating-collar ofabsorbent material in said pocket surrounding the piston-rod, thepiston-rod, and metallic packing in said box provided with a springholding the packing, so as to retain said collar in said pocket,substantially as and for the purposes set forth.

2. The metallic packing comprising the box, a flat end washer centrallyconvexed or raised on its inner side, a hard-metal washerhaving a flatsurface with a central depression receiving said convex portion and itsopposite end provided with the conical concentric recess, the splitbeveled packing-ring in said recess, an additional packing-ring andwasher, and a spring, arranged to operate substantially as described.

In a metallic packing, the two washers having the concentric conicalrecesses in their inner ends, the wide split packing-ring separating thetwo washers and having one end flat and the other end conical to enter arecess of one washer, and the conical split packing-ring, as described,fitted in the other washer and having the flat end bearing against theflat end of the large ring, as set forth and shown.

4. The combination of the box through which the rod passes, having aconcentric pocket at one end, a lubricating-ring therein, a washer inthe box bearing, against said ring, a washer having a concentric conicalrecess in its inner end, said washers at their engaging faces having araised boss and depression therefor to allow lateral play, anotherwasher having a conical recess, the interposed conical splitpacking-rings between said two washers having the conical recesses, andthe spring holding the parts together.

In testimony that we claim the foregoing as our own we atlix oursignatures in presence 5 of two witnesses.

ALDEN D. KILBORN. CHARLES YOUNG.

Witnesses:

PATI. KELLY, CHAR. G. CRAM.

